1
NEET 2016 Phase 2
MCQ (Single Correct Answer)
+4
-1
Change Language
If an electron in a hydrogen atom jumps from the 3rd orbit to the 2nd orbit, it emits a photon of wavelength $$\lambda $$. When it jumps from the 4th orbit to the 3rd orbit, the corresponding wavelength of the photon will be
A
$${{16} \over {25}}\lambda $$
B
$${9 \over {16}}\lambda $$
C
$${{20} \over 7}\lambda $$
D
$${{20} \over {13}}\lambda $$
2
NEET 2016 Phase 1
MCQ (Single Correct Answer)
+4
-1
Change Language
When an $$\alpha $$-particle of mass m moving with velocity v bombards on a heavy nucleus of charge Ze, its distance of closest approach from the nucleus depends on m as
A
$${1 \over {{m^2}}}$$
B
m
C
$${1 \over m}$$
D
$${1 \over {\sqrt m }}$$
3
NEET 2016 Phase 1
MCQ (Single Correct Answer)
+4
-1
Change Language
Given the value of Rydberg constant is 107 m$$-$$1, the wave number of the last line of the Balmer series in hydrogen spectrum will be
A
0.25 $$ \times $$ 107 m$$-$$1
B
2.5 $$ \times $$ 107 m$$-$$1
C
0.025 $$ \times $$ 104 m$$-$$1
D
0.5 $$ \times $$ 107 m$$-$$1
4
AIPMT 2015
MCQ (Single Correct Answer)
+4
-1
Change Language
A nucleus of uranium decays at rest into nuclei of thorium and helium. Then
A
The helium nucleus has more momentum than the thorium nucleus.
B
The helium nucleus has less kinetic energy than the thorium nucleus.
C
The helium nucleus has more kinetic energy than the thorium nucleus.
D
The helium nucleus has less momentum than the thorium nucleus.
NEET Subjects
EXAM MAP